RU2014150612A

RU2014150612A - METHOD FOR DECOMPOSITION OF ALUMINATE SOLUTIONS DURING PROCESSING OF NEPHELIN RAW MATERIAL

Info

Publication number: RU2014150612A
Application number: RU2014150612A
Authority: RU
Inventors: Виктор Михайлович Сизяков; Вячеслав Николаевич Бричкин; Динара Абдолловна Кремчеева; Егор Евгеньевич Гордюшенков
Priority date: 2014-12-12
Filing date: 2014-12-12
Publication date: 2016-07-10
Also published as: RU2599295C2

Abstract

Способ разложения алюминатных растворов при переработке нефелинового сырья, включающий деление раствора после первой стадии обескремнивания на содощелочную и содовую ветви, при этом раствор в содощелочной ветви подвергают декомпозиции и карбонизации, а в содовой ветви раствор после глубокого обескремнивания подвергают карбонизации, вводя в качестве затравки гидроксид алюминия, полученный в содощелочной ветви, отличающийся тем, что разложение алюминатного раствора в содощелочной и содовой ветви выполняется путем декомпозиции, длительность которой составляет от 3 до 4 часов при начальной концентрации затравки от 120 до 130 г/л и температуре процесса от 60 до 80°C с последующей карбонизацией растворов газами, содержащими СО, обеспечивающими снижение концентрации каустической щелочи в растворе со скоростью на уровне 10 г/л·час, до достижения требуемой концентрации углекислой щелочи и степени разложения алюминатного раствора.A method for decomposing aluminate solutions in the processing of nepheline raw materials, comprising dividing the solution after the first stage of desiliconization into soda alkali and soda branches, the solution in the soda alkali branch being decomposed and carbonized, and in the soda branch, the solution is carbonized after deep desalination, introducing aluminum hydroxide as a seed obtained in the co-alkaline branch, characterized in that the decomposition of the aluminate solution in the co-alkaline and soda branch is performed by decomposition, which has a duration of 3 to 4 hours at an initial seed concentration of 120 to 130 g / l and a process temperature of 60 to 80 ° C, followed by carbonization of the solutions with gases containing CO, ensuring a decrease in the concentration of caustic alkali in the solution at a rate of 10 g / l · hour, until the desired concentration of carbonic alkali and the degree of decomposition of the aluminate solution are achieved.

Claims

A method for decomposing aluminate solutions in the processing of nepheline raw materials, comprising dividing the solution after the first stage of desiliconization into soda alkali and soda branches, the solution in the soda alkali branch being decomposed and carbonized, and in the soda branch, the solution is carbonized after deep desalination, introducing aluminum hydroxide as a seed obtained in the co-alkaline branch, characterized in that the decomposition of the aluminate solution in the co-alkaline and soda branch is performed by decomposition, which has a duration of 3 to 4 hours at an initial seed concentration of 120 to 130 g / l and a process temperature of 60 to 80 ° C, followed by carbonization of the solutions with gases containing CO ₂ , which reduce the concentration of caustic alkali in the solution at a rate of 10 g / l · hour, until the desired concentration of carbonic alkali and the degree of decomposition of the aluminate solution are achieved.